Side by side

Serica Ref. 5303 Diving ChronometervsCWC SBS Divers Issue Quartz Watch Mk.2 Day/Date

The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.

Ref. 5303 Diving Chronometer
SericaRef. 5303 Diving Chronometer
MSRP $1,768
SBS Divers Issue Quartz Watch Mk.2 Day/Date
CWCSBS Divers Issue Quartz Watch Mk.2 Day/Date
MSRP $624

At a glance

10 of 29 specs differ
Diameter
Ref. 5303 Diving Chronometer39mm
SBS Divers Issue Quartz Watch Mk.2 Day/Date41mm
Power Reserve
Ref. 5303 Diving Chronometer42h
SBS Divers Issue Quartz Watch Mk.2 Day/Date40h
Water Resistance
Ref. 5303 Diving Chronometer300m
SBS Divers Issue Quartz Watch Mk.2 Day/Date300m
MSRP
Ref. 5303 Diving Chronometer$1,768
SBS Divers Issue Quartz Watch Mk.2 Day/Date$624

Full specifications

Case

3 specs
Diameter
39mm
41mm
Thickness
12.2mm
12mm
Lug-to-Lug
46.5mm
47mm

Crystal & Dial

2 specs
AR Coating
Yes
Inner
Dial Color
Enamel Black
CWC SBS Divers Issue Quartz Watch Mk.2 Day/Date, Black (SF300 QS120-DD)

Movement

4 specs
Caliber
M100 COSC
Type
Automatic
Quartz
Power Reserve
42h
40h
Complications
COSC
None

Pricing

1 specs
MSRP
$1,768
$624

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What people say

Owners + reviewers, side by side

Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.

Serica Ref. 5303 Diving Chronometer

Owners widely praise the Serica Ref. 5303 Diving Chronometer for its excellent wearability, definitive style, and smooth, confident bezel action. The dual scale on the bezel is noted as surprisingly useful, and the crown action, winding, and hacking are reported to work perfectly. One owner describes the Serica 5303-3 as gorgeous and unique, though another notes the crown can appear comically large. On balance, owners rate the Serica Ref. 5303 Diving Chronometer highly for its blend of unique design and robust functionality.

CWC SBS Divers Issue Quartz Watch Mk.2 Day/Date

The CWC SBS Divers Issue Quartz Watch Mk.2 Day/Date is widely praised for its exceptional legibility, particularly its dial design and thickly applied Super-LumiNova that remains readable all night. Owners appreciate its robust, toolish, bombproof design and comfortable wearability, with one noting its 11mm thickness and smaller wear size. The PVD finish withstands significant abuse. The Ronda movement is considered to have consistent second-hand movement. Some find its £700 price steep, especially compared to less expensive quartz divers, and fixed spring bars are noted as a drawback. Customer service is also flagged as potentially lacking by some. Overall, owners and reviewers rate the CWC SBS Divers Issue Quartz Watch Mk.2 Day/Date highly for its military aesthetics, legibility, and robust, comfortable tool-watch build.

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